It means the title argument is optional. So if you call the method with no arguments it will use a default value of “Error”. It’s shorthand for writing: This kind of shorthand trick with boolean expressions is common in Perl too. With the expression: it evaluates to true if either a or b is true. So if a is true you don’t need to check b at all. This … Read more
You have to specify the default values for the arguments only in the declaration but not in the definition. The default value for an member function’s argument can either go in declaration or definition but not both. Quote from ISO/IEC 14882:2003(E) 8.3.6 6) Except for member functions of class templates, the default arguments in a … Read more
There are several ways to simulate optional parameters in Java: Method overloading.void foo(String a, Integer b) { //… }void foo(String a) { foo(a, 0); // here, 0 is a default value for b }foo(“a”, 2); foo(“a”); One of the limitations of this approach is that it doesn’t work if you have two optional parameters of … Read more
There are several ways to simulate optional parameters in Java: Method overloading.void foo(String a, Integer b) { //… }void foo(String a) { foo(a, 0); // here, 0 is a default value for b }foo(“a”, 2); foo(“a”); One of the limitations of this approach is that it doesn’t work if you have two optional parameters of … Read more